From: "Eric S. Raymond" <esr@thyrsus.com>
To: "Gary E. Miller" <gem@rellim.com>
Cc: thumbgps-devel@lists.bufferbloat.net, gpsd-dev@nongnu.org
Subject: Re: [Thumbgps-devel] Progress on Plain Jane
Date: Tue, 1 May 2012 21:32:15 -0400 [thread overview]
Message-ID: <20120502013215.GB11394@thyrsus.com> (raw)
In-Reply-To: <20120501163302.575890f8.gem@rellim.com>
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Gary E. Miller <gem@rellim.com>:
> > That's excellent news. 0.5msec jitter is as good as we could have
> > expected and exactly what one would predict from a max error of 1msec
> > due to polling interval. The long-term NMEA/USB drift is consistent
> > with previous observations by Hal Murray and myself.
>
> Nice when theory and practice agree. I wonder if there is a USB 2.0
> equivalent of the PL2303 which would give us a 125 microSec poll?
>
> Might be worth asking navisys about that.
Maybe. But that would require that they qualify a new and probably more
expensive adapter part. We should get this puppy shipping and let them
see some ROI before we push that.
--
<a href="http://www.catb.org/~esr/">Eric S. Raymond</a>
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next prev parent reply other threads:[~2012-05-02 1:32 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-20 12:17 Eric S. Raymond
2012-03-20 17:45 ` Gary E. Miller
2012-03-20 21:49 ` Eric S. Raymond
[not found] ` <20120501151027.44487e16.gem@rellim.com>
2012-05-01 23:09 ` Eric S. Raymond
[not found] ` <20120501163302.575890f8.gem@rellim.com>
2012-05-02 1:32 ` Eric S. Raymond [this message]
2012-05-02 2:13 ` tz
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